20605620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{691}}^1$

素因数の和:781

約数の個数: 96

約数和(自身を含む): 66963456

約数和(自身を除く): 46357836

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 71, 84, 105, 140, 142, 210, 213, 284, 355, 420, 426, 497, 691, 710, 852, 994, 1065, 1382, 1420, 1491, 1988, 2073, 2130, 2485, 2764, 2982, 3455, 4146, 4260, 4837, 4970, 5964, 6910, 7455, 8292, 9674, 9940, 10365, 13820, 14511, 14910, 19348, 20730, 24185, 29022, 29820, 41460, 48370, 49061, 58044, 72555, 96740, 98122, 145110, 147183, 196244, 245305, 290220, 294366, 343427, 490610, 588732, 686854, 735915, 981220, 1030281, 1373708, 1471830, 1717135, 2060562, 2943660, 3434270, 4121124, 5151405, 6868540, 10302810, 20605620]

約数ペア:

[(1, 20605620), (2, 10302810), (3, 6868540), (4, 5151405), (5, 4121124), (6, 3434270), (7, 2943660), (10, 2060562), (12, 1717135), (14, 1471830), (15, 1373708), (20, 1030281), (21, 981220), (28, 735915), (30, 686854), (35, 588732), (42, 490610), (60, 343427), (70, 294366), (71, 290220), (84, 245305), (105, 196244), (140, 147183), (142, 145110), (210, 98122), (213, 96740), (284, 72555), (355, 58044), (420, 49061), (426, 48370), (497, 41460), (691, 29820), (710, 29022), (852, 24185), (994, 20730), (1065, 19348), (1382, 14910), (1420, 14511), (1491, 13820), (1988, 10365), (2073, 9940), (2130, 9674), (2485, 8292), (2764, 7455), (2982, 6910), (3455, 5964), (4146, 4970), (4260, 4837)]